不同湍流模型在旋风分离器三维数值模拟中的应用和比较  

Application and Comparison of Different Turbulence Models in the Three-dimensional Numerical Simulation of Cyclone Separators

作　　者：王海刚[1] 刘石[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《热能动力工程》2003年第4期337-342,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50076045)

摘　　要：采用标准κ-ε模型,RNGκ-ε模型和RSM(SSG)模型,对气—固旋风分离器中的单相湍流流场进行数值模拟计算。旋风分离器网格划分采用分块划分技术,每一块采用贴体坐标划分网格,计算结果同试验比较,三种模型中以RSM模型的预报结果最为合理,对切向速度分布的涡结构给出了合理的预报结果,同时给出了雷诺应力的各向异性特性,但同实验值仍有一定的差别,分析认为同湍流模型本身的原因外,与入口边界条件的选取和网格划分的多少有一定的关系。Numerical simulation calculations were conducted of single-phase turbulence flow fields in a gas-solid cyclone separator with the use of a standard Ε-e model, RNG Ε-e model and a Reynolds stress model (RSM). A bloc division technique was employed for the mesh division of the cyclone separator with each bloc using curvilinear coordinates for mesh division. The results of calculation were compared with those of experiments. Among the three models the prediction results of the RSM model have been found to be the most rational, which gave rational forecast results for a vortex structure with a tangential speed distribution. At the same time, the anisotropic behavior of Reynolds stresses was also presented. However, some discrepancy still exists between the simulation results and the experimental ones. An analysis has shown that apart from the feature of the turbulence model itself this can somehow be attributed to the selected inlet boundary conditions and the adopted mesh division.

关 键 词：旋风分离器 湍流模型 数值模拟 κ-ε模型 RNGκ-ε模型 RSM模型 

分 类 号：X964[环境科学与工程—安全科学] TQ051.84[化学工程]